AppArmor: Modify Arbitrary Files -- Unknown/Unspecified

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3013
                              AppArmor update
                              5 October 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           AppArmor
Publisher:         Ubuntu
Operating System:  Ubuntu
                   Linux variants
Impact/Access:     Modify Arbitrary Files -- Unknown/Unspecified
Resolution:        Patch/Upgrade

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3784-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running AppArmor check for an updated version of the software for 
         their operating system.

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-3784-1: AppArmor update

4 October 2018

AppArmor update

A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS

Summary

Use a more restrictive blacklist in several policy abstractions.

Software Description

  o apparmor - Linux security system

Details

As a security improvement, this update adjusts the private-files abstraction to
disallow writing to thumbnailer configuration files. Additionally adjust the
private-files, private-files-strict and user-files abstractions to disallow
writes on parent directories of sensitive files.

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 18.04 LTS
    apparmor - 2.12-4ubuntu5.1
Ubuntu 16.04 LTS
    apparmor - 2.10.95-0ubuntu2.10
Ubuntu 14.04 LTS
    apparmor - 2.10.95-0ubuntu2.6~14.04.4

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

  o LP: 1788929
  o LP: 1794848

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=2vjW
-----END PGP SIGNATURE-----